By Allison Lampert

LAS VEGAS, Oct 22 (Reuters) - At the world's biggest market program in Las Vegas high-end jets are drawing buyers with their smooth silhouettes, plush cabins - and progressively, their usage of alternative fuels.

Fuel manufacturers and jetmakers are eager to showcase unique types of air travel fuel considered less damaging to the environment, from utilized cooking oil to the distinctly less attractive meat waste.

Business jet operators, like airlines, have actually acquiesced ecological pressure on air travel and committed to cutting in half carbon emissions by 2050 compared with 2005.

Their hope is that adopting sustainable fuel to might make service jets more attractive to ecologically conscious purchasers - especially corporations facing questions over sustainability from shareholders or green campaign groups.

The schedule of less polluting private jets could likewise spare the rich and popular the negative publicity experienced by Britain's Prince Harry and his partner Meghan over a recent personal jet journey to southern France.

Five Gulfstream jets on display screen in Las Vegas are using California-produced fuel from inedible beef tallow.

The most recent waste-based fuels consist of "fats, grease and oils that are by-products of the food industry," stated Bryan Sherbacow, primary commercial officer of Boston-based biofuel manufacturer World Energy, which produces fuel from meat waste used by Gulfstream.

"All of our item is inedible."

Some of the other 79 airplane on display screen are anticipated to be powered by 150,000 gallons of other renewable fuel blends anticipated to be pumped at the program.

FLIGHT SHAMING

Private jets account for less than 0.1% of total annual carbon emissions worldwide, but can release, usually, as much as 20 times more carbon emissions per guest mile than jetliners, according to the London-based private charter firm Victor.

Prince Harry has actually safeguarded his periodic use of personal jets to guarantee his household's security, and has said that on the uncommon events he does not fly commercially he offsets his emissions.

But planemakers state events such as the furore over his itinerary have actually included fresh challenges for an industry currently aiming to validate its contribution to cutting business expenses.

"Incidents of flight shaming including the usage of private jets are unfortunate when you think about that our market has actually provided fuel performance enhancements of 40% over the previous 40 years," said Bombardier Aviation President David Coleal.

Bombardier thinks increased sustainable fuel use will assist the market make inroads with corporations and wealthy buyers. According to industry information, billionaires only have a 19% business jet ownership rate.

But even an image makeover - with jets sporting sticker labels like "this airplane flies on sustainable fuels" and organisers including alternative fuel pumps for checking out aircrafts - is unlikely to satisfy all critics at the Oct 22-24 luxury jet occasion.

Environmentalists and some experts stay skeptical that biojetfuels, generally combined 50-50 with kerosene, will make a substantial effect on public perceptions about high-end travel.

"No quantity of jatropha curcas or Brazil-nut fuel can make business jets look eco-friendly," stated air travel analyst Richard Aboulafia.

Demand from service jet operators for renewable fuels now far surpasses supply and their interest might drive future production, Sherbacow stated.

World Energy, which produces 40 million gallons of biofuel at its California plant, might broaden production approximately 150 million gallons by 2022.

Corporate charter business and consultants are also seeing more interest from customers who wish to buy carbon credits to balance out emissions from their flights.

Brian Proctor, CEO of Mente Group, a U.S. consultancy, stated emissions contributed in a business jet utilization study his business recently completed for a Fortune 500 company.

"At the end of the day, I think that price, cost per hour, variety, speed and performance, that's still the (sales) motorist. But I believe people are ending up being more aware of the sustainability of operations and how it impacts the planet." (Reporting By Allison Lampert, Editing by Tim Hepher and Alexandra Hudson)